Finding the Fourth Proportional to 99.60, 149.61 and 87.87
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Solution
The fourth proportional to 99.60, 149.61 and 87.87 is: 131.99
Step by Step Solution
- Step 1: Write the proportion equation
99.60 : 149.61 = 87.87 : x - Step 2: Convert to fraction form
99.60/149.61 = 87.87/x - Step 3: Cross multiply
99.60x = 149.61 × 87.87 - Step 4: Simplify right side
99.60x = 13,146.23 - Step 5: Solve for x
x = 13,146.23/99.60 - Step 6: Final answer
x = 131.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.